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Enhancing the Recyclability of a Vegetable Oil-Based Epoxy Thermoset through Initiator Influence

Abstract : Bisphenol A-based epoxy thermosets involve both environmental and health risks. By reacting a vegetal oil-based epoxide with an aromatic diacid containing S−S bonds a thermoset is produced. Herein, reprocessable thermosets were synthesized, the recyclability being designed through a dual mechanism: that of disulfide metathesis and of transesterifications. To assess the feasibility of the reprocessing, a series of 10 initiators was tested to probe their effect not only on the cross-linking reaction but also on the recyclability. This study introduces for the first time the key role of the initiator on the material performance and on their reprocessing. A very good reprocessability was obtained for thermosets prepared using as initiator the imidazole. Moreover, the thermosets exhibit complete chemical recyclability in 1 N NaOH at 80°C, after 3 days, without needing additional chemicals. The reprocessed materials have similar performance with the virgin ones, even after 10 cycles of reprocessing.
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https://hal.univ-cotedazur.fr/hal-03007277
Contributor : Alice Mija <>
Submitted on : Wednesday, January 27, 2021 - 10:11:56 AM
Last modification on : Friday, January 29, 2021 - 3:19:16 AM

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Chiara Di Mauro, Thi-Nguyet Tran, Alain Graillot, Alice Mija. Enhancing the Recyclability of a Vegetable Oil-Based Epoxy Thermoset through Initiator Influence. ACS Sustainable Chemistry & Engineering, American Chemical Society, 2020, 8 (20), pp.7690 - 7700. ⟨10.1021/acssuschemeng.0c01419⟩. ⟨hal-03007277⟩

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